Improvement in machines for corrugating sheet-metal



--1. L. PIPEB- & 1. A. NICHOLS. 7 Machine for" Corrugating Sheet-Metal.,NOJGHSZ PaientdMarch23,187 5.

THE GRAPHIC CO.PHOTO-LITH.39 8:41 PARK PLAGE,N.Y.

NI'IED STATES PATENT OFFICE.

JOHN PIPER AND JOHN A. NioHoLs, on PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN MACHINES FOR CORRUGATING SHEET-METAL.

Specification forming part of Letters Patent No. 161,152, dated March23, 1875; application filed November 3, 1874.

To all whom it may concern:

Be it known that we, JOHN L. PIPER and JOHN A. NICHOLS, of Pittsburg, inthe county of Allegheny and State of Pennsylvania, have invented a newand useful Improvement in Apparatus for Oorrugating Sheet Metal; and wedo hereby declare the following to be a full, clear, and. exactdescription thereof, reference being had to the accompanying drawings,forming part of this specification, in which- Figure 1 is a frontelevation, Fig. 2 is a plan View, and Fig. 3 is an end view, of amachine embodying our invention.

Like letters refer to like parts in the several figures.

Our invention relates to apparatusfor bending and corrugating sheetmetal, and belongs to that class in which the metal is corrugated bypassing it between a grooved rolls.

Our invention consists in a feed-table havpair or series of ing pivotedsupports, and operated from the.

rolls by a slotted link and arm, and having an adjustable gage, so as togage the distance each sheet shall be made to enter before being seizedby the rolls.

1n the drawings referred to, A represents the housings, which may be ofany form suitable to support the operative parts. B is the upper roll,and B the lower, journaled in the housings A 5 the upper roll beingadjusted by means of the usual housing-screws b, and driven from thepower-shaft a through the bevel-gearing a a worm a and worm whee1 b, orsimilar devices. The lower roll B may be driven by friction or geared tobe driven from and move with the upper roll B. The rolls B and B aregrooved longitudinally or parallel to their axes, the size and depth ofthe grooving corresponding to the size of the corrugations to be formedon the sheet metal, and theyare so arranged that the projections orelevations upon one roll coincide with the depressions or grooves in theother, and, as a consequence, any substance passed between the rollswill be griped along one line only at any given time, the same as if apair of plain rolls were used. Pivoted to the journal of the lower rollB is a lever, a, slotted at 0 so as to move upon the pin connecting itto arm m of rock-shaft m working over pin 6, so as to raise the lever onpart of its stroke, so that during a part of the travel of lever c itceases to operate the rock-shaft m, and. the table 0 is at rest. Thetable 0 is supported in front by standards 0 attached to the rock-shaftm, and at the rear or near the rolls by standards 0 pivoted to the basesupporting the housings. By this means the lower roll in its revolutionimparts vibratory motion to the feed-table. Upon the feed-table isarranged a gage-bar, F, adjustable by means of slots f and set-screws,or other suitable devices. This gage is altered to accord with the widthof the metal sheet, and. is adjusted to regulate the distance the sheetis to be fed between the allelism of the sheet and the grooves of therolls.

The operation of these devices is as follows:

The rolls, of a size adapted to the work to be performed, and properlyadjusted by means of the housing-screws, receive motion from thepower-shaft, and, through the medium of the rock-shaft pivoted to thelower roll, impart a vibratory motion to the feed-table, which carriesforward the sheet resting thereon so as to cause the sheet to enter therolls to a greater or less extent according to the manner in which thefirst corrugation is to be turned on the edge of the sheet.

The instant the sheet is fed between the rolls it is seized along oneline only, the bite advancing along the sheet in a given line, causingthe metal to conform to the corrugations of the rolls by a bending orfolding motion without drawing or thinning it, and avoiding any tendencyto crimp or buckle it.

It is evident that the length of the sheet passed through the rolls willbe limited only by the length which it is possible to make the rolls,the extreme usual length of the sheets heretofore corrugated being aboutnine or ten feet, which is fully within the scope of rolls which it ispracticable to construct as above described.

What we claimas our invention, and desire PIPER and JOHN A. NICHOLS,hereunto set to secure by Letters Patent, isour hands. 7

The combination of the rolls B B, feed- JOHN L. PIPER, table 0, pivotedsupports 0 c rock-shaft m, slotted link 0, and pin 0, substantially asand Witnesses: for the purpose specified. T. B. KERR,

In testimony whereof we, the said JOHN L. F. W. BITTER, Jr.

JOHN A. NICHOLS.

